Bench plane



A J. szAKo Oct. 18, 1927.

BENCH PLANE Filed July 5l, 1925 J. SZAKO BENCH PLANE oct.- 18,1927.

Filed July 31,' 1925' 2 Sheets-Sheet 2 atroz Mq Patented Oct. 18, 1927.

UNI-TED-r STATES JOI-IN SZAKO, OF NEW YORK, N. Y.

BENCH PLANE.

applicati@ mea July 31, 1925. serial No. 47,268.

My invention relates to improvements in benclrplanes and has for itsobject to provide mechanism for adjusting the bit longitudinally andlaterally of its bed to square the cutting edge of the bit with thestock and clamping means for readily andv securely :locking the bit inits adjusted positions.

A further object of the invention is to provide mechanism of theabove-mentioned character which is simple and durable in construction,reliable and eiiicient in operation and inexpensive to manufacture.

Other objects and advantages ofthe in vention will be apparent duringthe course of the following description.

Inthe accompanying drawings. forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. 1, is a longitudinal sectional view of a plane constructed inaccordance with my invention,

Fig. 2, is a plan view of the same,

Fig. 3, is a bottom view of the cutter bed,

Fig. 4, is a sectional view taken on lines 4-4 of Fig. 1,

Fig. 5 is a bottom perspective view of the thumb-wheel, and,

Fig. 6, is aperspective view of the bit.

In the drawings. wherein for the purpose of illustration. I have shown apreferred embodiment of my invention, the body or stock 10 is of theusual channeled form and is preferably constructed of aluminium. Theusual hand grips 11 and 12 are provided at the rear and front endsof thestock and the grip 11 has a central bore 13, closed by the hinged cover14 which serves as a receptacle for grease and the like. The bottom ofthe stock forward of the throat 15 has an auxiliary movable base plate16 mounted thereon, which is'adjustable longitudinally to regulate thesize of the throat. The plate is adjusted through the medium of thescrew 17, j ournaled in the raised fiange 18 'and having threadedengagement with the opening through the stem 18 of the hand grip 12.

The usual frog or cutter bed 19 is mounted on the stock by the screws 2Oextending through elongated slots 21, which permit adjustment of the bedwith respect to the throat 15. The bed supports the bit 22 having alongitudinal keyhole slot 23 and a transverse slot 24 above the upperend of the slot 23, to receive the peripheral edge of the milled head 25ofthe adjusting screw 26 which i, threadedly engages the bore 27 throughthe bed, allowing adjustment of the bit longitudinally of the bed. Aspringvplatev28 lis mounted on the bit 22 and is held in clampfA ingengagement ktherewith by the setscrew 29 and the depending lug 30 whichengages the keyholev slot 23.

Lateraladjustment of the bit is effectedthrough the thumb-wheel 31having a" central depending bearing 32, journaled on the pin 33 and aneccentric 34 formed integral with the bearing which extends through theplate 28 and engages the key-hole slot 23 in the bit. a bevel flange35', bearing against'the top of the plate 28 and has its peripheral edgemilledso it may be readily gripped by the fingers and turned, when it isdesired vtor lateraly adjust the bit. `The` upper end of the pin 33 isthreaded, as at 33, and extends The thumb-wheel is surrounded byv abovethe top of the thumb-wheel, having a clamping nut 36 threaded thereon.

f lower end of the pin is disposed in a slot in the cutter bed andadjacent its end is a reduced square shaped portion 37, providing acircumferential groove, adapted to receive the bifurcated end 38 of thelocking bar 39, whichl is slidably mounted in the spaced straps 40secured to the bottom of the cutter bed by the screws 40. The upper endof the bar is bent downwardly to form a finger engaging hook 41 formoving the bar into and out of engagement with the pin and the lower endof the bar is provided with shoulders 42 limiting the upward movement ofthe bar.

In operation, the bit is first longitudinally and laterally adjustedwith respect to the bed, through the medium of the screw 26 andthumb-wheel 31, after which the locking bar 39 is moved into engagementwith the groove of the pin 33 and upon turning of the clamping nut 36,it is seen that the thumb-wheel will be pressed into tightv clampingengagement with the plate 28 securely holding the bit in its adjustedposition upon the bed. When it is desired to readjust the bit, theclamping nut 36 is unscrewed, thereby automatically releasing thepressure of the thumb-wheel on the plate, so that the bit isl free foradjusting. i

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same and thatcertain changes in the shape,

The

size and arrangement of theparts ma be made Without departing from thespirit of' sai A"hit and bed, a thumb-wheel journaled on said pin havingan eccentric engaging said 'sloti means' carried by said bed for lockingsaid pin. against movement, and

means'carriedby the upper end of said pin for clamping said thumb-wheeiin engagement with vsaid bit.

2. In a bench plane bit clamping means,

the combination with a bed and bit7 of a pin i extending through saidbit and bed having a reduced Vsquare portion adjacent its Vlower end, a.looking bar slidably mounted beneath y said bed having a bifurcated endadaptedto enga said square portion of the pin, a thum-Wheel journaled onthe upper end of said pin, and means carried by said pin for` clampingsaid thumb-Wheel in its adjusted position.

- 3. In albench plane, the combination of a had, a bit supported by saidbed,4 havlng a central bearing journaled on said pin, an

`eccentric formed integral with said bearing engaging said slot,V meanscarried by said l bed foriocking said pin against movement,

and means carried by said pin for clamping Vsaid thumb-wheel in itsadjusted position.

4. In a bench plane bit clam ing means, the combination with a bed andit,of a pin extending through said `bit `and bed, a thumbwheel journaledon the upper end of said pin, releasable means for locking said-v pinagainst movement, and means fmrclamp-l ing said thumb-Wheel in itsvadjusted posi-A tion.

5. In a bench plane, the combination of a bed, a bit supportedbysaidrbed' having a longitudinal slot, a pin extending through said'bedand slot, a thumbfwheei journaed on said pin having an eccentric adaptedto engage said siot, said wheel having `a beveled flange, means forlockingsaid pin against movement, and means carried by said pin forclamping said vWheel in its adjusted position. f Y

In testimony whereof I aix my signature.

JOHN szAKo.

